APA aipamena

Ems, E. (1988). Economics of public information systems. Dept. of Economics, University of Stockholm.

Chicago Style aipamena

Ems, Emil. Economics of Public Information Systems. Stockholm: Dept. of Economics, University of Stockholm, 1988.

MLA aipamena

Ems, Emil. Economics of Public Information Systems. Dept. of Economics, University of Stockholm, 1988.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.